Development of an ultrastable fiber optic frequency distributionsystem using an optical delay control module [for frequency standard andVLBI] |
| |
Authors: | Sato K Hara T Kuji S Asari K Nishio M Kawano N |
| |
Affiliation: | Mizusawa Astrogeodynamics Obs., Nat. Astron. Obs. ; |
| |
Abstract: | An ultrastable fiber optic frequency distribution system is described. The ultrastable phase stability is achieved by configuring a closed phase-locked loop with a single-mode optical fiber transmission line in which two optical carrier signals with different wavelengths are transmitted as a forward and a backward signal, and installing an optical delay control module which has no differential dispersion effect between the two optical carrier waves and induces no electrical noise. A phase stabilized optical fiber (PSOF) is used for the signal transmission line. The stabilities of this system are 7.5×10-17 and 1.1×10-17 in Allan standard deviation at 1000 and 10000 s averaging time, respectively, while the environmental temperature of the PSOF cable varies as much as the range of 10°C and the rate of 10°C/12 h |
| |
Keywords: | |
|
|